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drm/radeon: disable ss on DP for DCE3.x

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Seems to cause problems with certain DP monitors.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=40699

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2014-01-13 16:47:05 -05:00
parent 6dfa09d7c9
commit d8e2452509
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -938,11 +938,14 @@ static bool atombios_crtc_prepare_pll(struct drm_crtc *crtc, struct drm_display_
radeon_atombios_get_ppll_ss_info(rdev,
&radeon_crtc->ss,
ATOM_DP_SS_ID1);
} else
} else {
radeon_crtc->ss_enabled =
radeon_atombios_get_ppll_ss_info(rdev,
&radeon_crtc->ss,
ATOM_DP_SS_ID1);
}
/* disable spread spectrum on DCE3 DP */
radeon_crtc->ss_enabled = false;
}
break;
case ATOM_ENCODER_MODE_LVDS: